Where does “stizzare” come from?

stizzare (Italian) comes from Italian stizza, from Italian stizzo, from Italian tizzo, from Latin titio, from Proto-Italic tītjō, from Proto-Indo-European teih₁- — to become hot, melt "or" to end.

Ancestry of “stizzare”, step by step

Step	Language	Word	Meaning
1	Italian	stizza	anger, irritation, vexation, chafe
2	Italian	stizzo	—
3	Italian	tizzo	Alternative form of tizzone
4	Latin	titio	firebrand
5	Proto-Italic	tītjō	heating
6	Proto-Indo-European	teih₁-	to become hot, melt "or" to end

Every word from Proto-Indo-European teih₁- →Every word from Proto-Italic tītjō →Every word from Latin titio →